Infiniti FX35, FX50 (S51). Manual — part 1170
INTAKE DOOR MOTOR
HAC-77
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK INTAKE DOOR MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect intake door motor connector.
3.
Check continuity between intake door motor harness connector and ground.
Is the inspection result normal?
YES
>> Replace intake door motor.
NO
>> Repair harness or connector.
5.
CHECK INTAKE DOOR CONTROL LINKAGE
Check intake door control linkage is properly installed. Refer to
Is it installed normally?
YES
>> INSPECTION END
NO
>> Repair or adjust control linkage.
WITH ACCS
WITH ACCS : Description
INFOID:0000000005246263
COMPONENT DESCRIPTION
Intake Door Motor
The intake door motor (1) is attached to the blower unit. It rotates so
that air is drawn from inlets set by the unified meter and A/C amp.
Motor rotation is conveyed to a lever which activates the intake door.
WITH ACCS : Component Function Check
INFOID:0000000005246264
1.
CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK
1.
Press AUTO switch. AUTO INTAKE indicator and REC indicator turns ON (auto intake mode).
(+)
(
−
)
Voltage
Intake door motor
—
Connector
Terminal
M254
3
Ground
SJIA1453J
Intake door motor
—
Continuity
Connector
Terminal
M254
2
Ground
Existed
:
Vehicle front
JSIIA0007GB
HAC-78
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
INTAKE DOOR MOTOR
2.
Press intake switch. AUTO INTAKE indicator and REC indicator turns OFF (fixed FRE mode).
3.
Press intake switch again. REC indicator turns ON (fixed REC mode).
4.
Press intake switch again. AUTO INTAKE indicator and REC indicator turns ON (auto intake mode).
5.
Listen for intake door position change. (Slight change of blower sound can be heard.)
NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and the intake door position is at
FRE when D/F or DEF is selected.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to diagnosis procedure. Refer to
HAC-78, "WITH ACCS : Diagnosis Procedure"
WITH ACCS : Diagnosis Procedure
INFOID:0000000005246265
1.
PERFORM SELF-DIAGNOSIS
Perform self-diagnosis function. Refer to
HAC-62, "WITH ACCS : Diagnosis Description"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 2.
2.
CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR
Check voltage between intake door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK SIGNAL FOR INTAKE DOOR MOTOR
Confirm A/C LAN signal between intake door motor harness connector and ground using an oscilloscope.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK INTAKE DOOR MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect intake door motor connector.
3.
Check continuity between intake door motor harness connector and ground.
(+)
(
−
)
Voltage
(Approx.)
Intake door motor
—
Connector
Terminal
M254
1
Ground
12 V
(+)
(
−
)
Voltage
Intake door motor
—
Connector
Terminal
M254
3
Ground
SJIA1453J
INTAKE DOOR MOTOR
HAC-79
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is the inspection result normal?
YES
>> Replace intake door motor.
NO
>> Repair harness or connector.
5.
CHECK INTAKE DOOR CONTROL LINKAGE
Check intake door control linkage is properly installed. Refer to
Is it installed normally?
YES
>> INSPECTION END
NO
>> Repair or adjust control linkage.
Intake door motor
—
Continuity
Connector
Terminal
M254
2
Ground
Existed
HAC-80
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
BLOWER MOTOR
BLOWER MOTOR
Description
INFOID:0000000005246266
COMPONENT DESCRIPTION
Brush-less Motor
The blower motor utilizes a brush-less motor with a rotating magnet.
Quietness is improved over previous motors where the brush was
the point of contact and the coil rotated.
Component Function Check
INFOID:0000000005246267
1.
CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK
1.
Press fan (UP: +) switch. Blower should operate on low speed.
2.
Press fan (UP: +) switch, and continue checking blower speed and fan symbol until all speeds checked.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to diagnosis procedure. Refer to
Diagnosis Procedure
INFOID:0000000005246268
1.
PERFORM SELF-DIAGNOSIS
Perform self-diagnosis function STEP-4. Refer to
HAC-57, "WITHOUT ACCS : Diagnosis Description"
(WITH-
OUT ACCS) or
HAC-62, "WITH ACCS : Diagnosis Description"
(WITH ACCS).
Does blower motor speed change according to each code No.?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK POWER SUPPLY FOR BLOWER MOTOR
1.
Disconnect blower motor connector.
2.
Turn ignition switch ON.
3.
Check voltage between blower motor harness connector and ground.
RJIA2467J
ZHA152H
Code No.
41
42
43
44
45
46
Blower motor duty ratio
37%
91%
65%
91%
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